The mb_strripos() function is a PHP inbuilt case-insensitive function that is utilized to find the position for the last occurrence of a string inside another string.
Syntax:
mb_strripos($haystack, $needle, $offset = 0,encoding = null): int|false
Parameters: This function accepts four parameters described below:
- $haystack: This parameter defines a string in which we will search our $needle parameter string.
- $needle: This is a string parameter that searches in the $haystack string parameter.
- $offset: This is an optional parameter that describes where you are to start searching a string, if this defines negative it will start from the end of the $haystack.
- $encoding: This is an optional parameter that describes the encoding of the string, if this parameter is not defined it will use an internal encoding.
Return Value: This function returns the numeric position for the last occurrence of the needle in the haystack string, otherwise it will return “false”.
Example 1: The following code describes the use of the mb_strripos() function.
PHP
<?php $string = 'Geeks for Geeks'; $substring = 'for'; $pos = mb_strripos($string, $substring); if ($pos !== false) { echo "The last occurrence of '{$substring}' is at position {$pos} in '{$string}'."; } else { echo "The substring '{$substring}' was not found in '{$string}'."; } ?> |
Output:
The last occurrence of 'for' is at position 6 in 'Geeks for Geeks'.
Example 2: The following code describes the use of the mb_strripos() function.
PHP
<?php $string = 'Programming is not easy if you does not use neveropen'; $substring = 'you'; $offset = 10; $pos = mb_strripos($string, $substring, $offset); if ($pos !== false) { echo "The last occurrence of '{$substring}' is at position {$pos} in '{$string}', starting from offset {$offset}."; } else { echo "The substring '{$substring}' was not found in '{$string}' after offset {$offset}."; } ?> |
Output:
The last occurrence of 'you' is at position 27 in 'Programming is not easy if you does not use neveropen', starting from offset 10.
Reference: https://www.php.net/manual/en/function.mb-strripos.php
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